<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoles = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表的数据 -->
            <el-table :data="roleList" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning" v-for="(item3) in item2.children" :key="item3.id">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="bjEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="bjremoveUserById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
            <!-- 添加角色 -->
            <el-dialog
                title="添加角色"
                :visible.sync="addRoles"
                width="50%"
                @close="bjDialogList"
            >
                <!-- 添加角色表单 -->
                <el-form
                    :model="addRForm"
                    label-width="90px" 
                    :rules="addFormRoles" 
                    ref="addFormRef" 
                >
                    <!-- 角色名称 -->
                    <el-form-item label="角色名称" prop="roleName">
                        <el-input v-model="addRForm.roleName"></el-input>
                    </el-form-item>
                    <!-- 角色描述 -->
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="addRForm.roleDesc "></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="addRoles = false">取 消</el-button>
                    <el-button type="primary" @click="addUser">确 定</el-button>
                </span>
            </el-dialog>
            <!-- 编辑角色 -->
            <el-dialog
                title="编辑角色"
                :visible.sync="bjRoles"
                width="50%"
                @close="bjDialogClosed"
            >
                <!-- 编辑角色表单 -->
                <el-form
                    :model="bjRForm"
                    label-width="90px" 
                    ref="bjFormRef" 
                    :rules="addFormRoles"
                >
                    <!-- 角色名称 -->
                    <el-form-item label="角色名称" prop="roleName">
                        <el-input v-model="bjRForm.roleName"></el-input>
                    </el-form-item>
                    <!-- 角色描述 -->
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="bjRForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="bjRoles = false">取 消</el-button>
                    <el-button type="primary" @click="bjUserInfo">确 定</el-button>
                </span>
            </el-dialog>
        </el-card>
        <!-- 点击分配权限按钮，弹出 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            @close="setRightDialogClosed"
        >
            <!-- Tree 树形控件 -->
            <el-tree 
                :data="rightslist" 
                node-key="id" 
                show-checkbox 
                default-expand-all 
                :props="treeProps"
                :default-checked-keys = "defKeys"
                ref="treeRef"
            ></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button 
                    type="primary" 
                    @click="allotRights"
                    >确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
    export default {
        data(){
            return{
                roleList:[],
                addRoles:false,
                // 添加角色
                addRForm:{
                    roleName :'',
                    roleDesc :''
                },
                // 格式判断
                addFormRoles:{
                    roleName:[
                        {required:true,message:'请输入名称',trigger:'blur'},
                    ],
                    roleDesc:[
                         {required:true,message:'请输入描述',trigger:'blur'}
                    ]
                },
                // 编辑角色
                bjRoles:false,
                bjRForm:{},
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible:false,
                // 所有权限的数据
                rightslist:[],
                // 树形控件的属性绑定对象
                treeProps:{
                    label:  'authName',
                    children: 'children'
                },
                // 默认选中的结点id值数组
                defKeys:[],
                roleId:''
            }
        },
        created(){
            this.getRolesList()
        },
        methods:{
            bjDialogList(){
                this.$refs.addFormRef.resetFields()
            },
            // 获取列表
            async getRolesList(){
                const {data : res} = await this.$http.get('roles')
                if(res.meta.status !== 200){
                    return this.$message.error(('获取角色列表失败！'));
                }
                this.roleList = res.data
            },
            // 添加角色用户
            addUser(){
                this.$refs.addFormRef.validate(async valid => {
                    if(!valid) return
                    // 发起用户的api的请求
                    const {data:res} =await this.$http.post('roles',this.addRForm)
                    // 状态码失败
                    if(res.meta.status != 201){
                        this.$message.error('添加角色失败！')
                    }
                    this.$message.success('添加角色失败！')
                    // 关闭框
                    this.addRoles = false
                    // 重新刷新列表
                    this.getRolesList()
                })
            },
            // 监听编辑角色对话框的关闭时间
            bjDialogClosed(){
                this.$refs.bjFormRef.resetFields()
            },
            // 编辑角色
            async bjEditDialog(id){
                const {data:res} = await this.$http.get(`roles/${id}`)
                if(res.meta.status !== 200){
                    this.$message.error('查询用户信息失败！')
                }
                this.bjRForm = res.data
                this.bjRoles = true
            },
            // 编辑角色点击保存按钮
            bjUserInfo(){
                this.$refs.bjFormRef.validate(async valid => {
                    if(!valid) return
                    // 发起用户的api的请求
                    const {data:res} =await this.$http.put(`roles/${this.bjRForm.roleId}`,{
                        roleName: this.bjRForm.roleName,
                        roleDesc: this.bjRForm.roleDesc
                    })
    
                    // 状态码失败
                    if(res.meta.status != 200){
                        this.$message.error('更新用户信息失败！')
                    }
                    // 隐藏添加用户的对话框
                    this.bjRoles = false
                    // 调用
                    this.getRolesList()
                    // 提示修改成功
                    this.$message.success('更新用户成功！')
                })
            },
            // 删除角色
            async bjremoveUserById(id){
                 // 弹框询问用户是否继续
                const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
                // 如果用户确认删除，返回值字符串 confirm
                // 如果用户取消删除，返回值字符串 cancel
                if(confirmResult !== 'confirm'){
                    return this.$message.info('已经取消删除')
                }
                const {data:res} = await this.$http.delete(`roles/${id}`)
                if(res.meta.status !== 200){
                    this.$message.error('删除角色失败！')
                }
                this.$message.success('删除角色成功！')
                this.getRolesList()
            },


            // 分配权限
            // 根据id删除对应的权限
            async removeRightById(role,rightId){
                // 弹框提示用户是否要删除
                const confirmResult = await this.$confirm('此操作将永久删除, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)

                if(confirmResult !== 'confirm'){
                    return this.$message.info('取消了删除！')
                }

                const {data:res} =  await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if(res.meta.status !== 200){
                    return this.$message.error('删除权限失败')
                }
                // this.getRolesList()
                role.children = res.data
            },

            // 点击分配权限  展示分配
            async showSetRightDialog(role){
                this.roleId = role.id
                // 获取所有权限的数据
                const {data:res} = await this.$http.get(`rights/tree`)

                if(res.meta.status !== 200){
                    return this.$message.info('查找权限失败')
                }
                // 获取到的权限数据保存的 rightslist 中
                this.rightslist = res.data
                console.log(this.rightslist)

                // 递归获取三级节点的id
                this.getLeafKeys(role,this.defKeys)

                this.setRightDialogVisible = true
            },

            // 通过递归的形式，获取角色下所有三级权限
            getLeafKeys(node,arr){
                // 如果当前 node 节点不包含children属性，则是三级节点
                if(!node.children){
                    return arr.push(node.id)
                }

                node.children.forEach(item => {
                    this.getLeafKeys(item,arr)
                })
            },

            // 监听分配权限对话框的关闭事件
            setRightDialogClosed(){
                this.defKeys = []
            },

            // 点击为角色分配权限
            async allotRights(){
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')
                const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
                if(res.meta.status !== 200){
                    return this.$message.error('分配权限失败')
                }
                this.$message.success('分配权限成功')
                this.getRolesList()
                this.setRightDialogVisible = false
            }
        }
    }
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 8px;
    }
    .bdtop{
        border-top: 1px solid #eee;
    }
    .bdbottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>
